Sand-blast tumbler



Jan. f7, 1928.

1,656,238 R. RUEMELIN SAND BLAS T TUMBLER !Fi1ed Dec. 12. 1921 s Sheets-Sheet 1 '38 5? l9 INVEN TOR BY ATTYs.

' Jan. 17,1928.

1,656,238 R. RUEMELIN SAND BLAST TUNBLER Filed Dec. 12. 1921 s Sheets-Sheet 2 m, INVENTOR 2 Q, a) Z, Q LW L ATTYS.

Jan. 17, 1928.

. R. RUEMELIN sum smr TUMBLER Filed Dec. 12. 1921 3 Sheets-Sheet 3 lNVENTOR G MM ATTYS.

ill

Patented ill-m l7,

stares SANll-B .u L, MEIITTTTESOTA.

ST TUBIBLER.

Application filed December 12', 1821. Serial No. 521,766.

This invention relates to improvements in tumbling barrels or tubs, as they are usually designated, and especially to devices wherein castings or other articles to be cleaned, or operated upon, are placed in a barrel or tub, which is rotated Whl lo the articlcstherein are vet ed upon by sand-blast jets. Devices of this kind are largely employed in the indusrice for removing dust, dirt, or scale from. parts it is desired to clean, or upon which it is desired to expose a clean surface,

The principal ect of this invention is to provide a tub or receptacle, rotatable on a lined slope so as to can e the parts which are lneioig cleaned to be agitated and rubbed against one another and against the inner surfaces of the receptacle, breakageof the parts being; avoided by such rubbing action.

Other objects of the invcntion'areto provide means tor quickly discharging the parts from the tub or receptacle after they are cleaned; to provide for the oscillating oi the sand-blast jets upon the parts to be cleaned, vshile such parts are being agitated in the revolving tub or receptacle, thereby rapidly and thoroughly cleaning-all sides and surfaces of such parts; to provide means for enclosing the tub Within a dust-tight ven tilated casing thereby avoidingthe objectionable escape of dust Which would interfere "with the gearing oi the machine and cause annoyance to the operator; to provide the enclosing casing with electric lights for 11- luminating its interior; to provide a sight screen or Window for observation of the parts While being cleaned; to provide a sand hopper inside of the casing tor the collection of sand and dirt, with means for screening such sand, and for re-claiming and cleaning the sand that is capable of reuse, and to pro vide means whereby the oscillation of the sand-blast jets can be performed by mechanpower, or by hand power.

The invention consists generally in the constructions and combinations hereinafter described and particularly pointed out in the claims,

In the drawings:

Figure 1 is a plan section on line 1,1 of

Figure 2, looking in the direction of the arrows; I

Fu ure 2 s a front elevation and partial secti n n line F2 of: Figure 4:;

Figure 3 is a side elevation showing the stand-blast jet oscillating mechanism;

Figure l is a sectional elevation on line tll of Figure 1 looking in the direction of the arrows;

Figure 5 a scctionalelevation on line 5-5 of Figure 6, with the addition of the enclosing casing, which is also shown in section;

Figure 6 is a plan of the open tub or receptacle, looking in the direction of the arrorvstP-G of Figure Figure 7 is a sectional elevation on line i'-7 Oil inure S; with theaddition of the enclo i no, which also shown in section Figure in the direction oi. the arrows 8 8 of Figure/ 7;

Figure 9 is a vertical section showing a modified casing and oscillating mechanism. 1 In thedrawingrs, l representsthe cleaning receptacle Which is prcit'erably in the form of an open tub, the enclosing, Walls of which may be polygonal or cylindrical, and may be vertical, as shown in Figures 5, 7 and 9, or composedof flaring and vertical sections to shown in Figures 2 and 4, the latter con structiouproducing, a receptacle, the open top of whichis smaller than thegreateet di ameter of the receptacle. The receptacle is preferably provided with a discharge door 2 secured in place by suitable hinges 4, and provided with a latch or lock 3. I may arange in proximity to the low side of the tub, or receptacle, a suitable stationary chute or slide 5 (lligures 1 and 4).

The receptacle is also preferably provided with a-bearing hub 6, preferably mounted upon afixed shaft 7. This shaft is secured to a suitable pedestal, or stand 16, which is arranged to permit the shaft 7 to stand in an inclined position as shown in Figures l, 5, 7, an d 9. This pedestal may be braced by an inclined bar 18. .The bearing hub 6 of the tub. or receptacle, is preferably provided with a beveled gear 8, suitably keyed or otherwise secured to said huh.

I also provide a driving or powershaft 9 mounted in suitable bearings 11 upon a stationary frame 17. The pedestal 16 and frame 17 are both preferably supported upon asuitablc base l9: The li 9 is pr 8 is a top view of thetub looking at a slow speed when the belt is in engagcment with the large pulley 12 and at a higher speed when it is in engagement with the smaller pulley 12.

The driving shaft 9 is preferably provided with a suitable cam (Figure 3), and an oscillating lever 21, pivoted at 22 on a stud 64., arranged upon theinachine casing, hereinafter described, is provided with a spring 23 which tends to hold the end of the lever 21 at all times in contai't with the cam 20. A link 25 is pivotally connected by the pin 24 to the lever 21, and said linlr is provided with a recess or slot 20, adapted to engage a pin 27 on an arm 28. he arm 28 issecured upon one end of the shaft mounted in supports upon the casing, hereinafter described. Two or more of the pins 27 may be provided on the arm 28.

A suitable sand blast nozzle 30 generally designated a gun, is supported upon the shaft 29, preferably by means of an adjustable clamp 34, and a hanger arm 32 to which said clamp is connected said hanger being pivotally supported by a suitable pin 33 upon a hub 31 that is secured to said shaft 29.

In Figure 9 oscillation of the blast nozzle is caused by the cam 20, and the sliding rod 68 operating against lever 28. Vertical adjustment of the blast nozzle is caused by the threaded portion 70 of hanger 32 and the vlook nut '69.

In Figure 9 the door 41 is hinged at 42 on the rear side of the casing so that the door swings upward as shown by dotted lines.

The tub 1 may be discharged by an unlocking latch 59 and tilting the tub as shown in dotted lines, or the tub may be entirely removed from the casing 40 by the handles 60, and replaced by another loaded tub. The oscillating lever 28 Fig. 9 makes contact by pressure with the end of the sliding rod 68, so that by lowering the door 41 the oscillating lever is made to come in contact with the sliding rod.

The blast nozzle has connected to it a suitable hose 36 by means of which air under pressure for'producing said sand blast may be introduced into the nozzle 30. A hose is also connected to the sand blast nozzle 30, and this hose is provided at its lower end with a suitable sand sucker 37, preferably arranged in a box 38, adapted to hold clean sand, said box being ireferably provided with a suitable sand sieve 39.

It will be understood that air under considerable pressure is supplied to the nozzle 30 through the pipe or connection 36, and that the suction created thereby lifts the sand from the sand box 38, bringing said sand into the air blast through said nozzle.

I make no claim in this application to the sand blast nozzle, or gun, that I use in this apparatus, although the blast nozzle or gun dis losed in my application for Letters Patent, Serial No. 474,791, filed June 3, 1921, I find to work very satisfactorily in connec tion with my present invention.

' I irelcr to arrange the tub or receptacle 1 in a suitable dust tightcasing 40, the bottom of said casing 10 forming, with the casing walls, a sand hopper for collecting the sand that passes out of the tub or receptacle into the casing. The casing is preferably providedwith a suitable door all having hinges 42 and a suitable latch 48.

I also prefer to provide the casing with a suitable observation window or screen it through which the operator may see the interior of the casing, and'I find it desirable to provide within the casing an electric light 4.5 that brings the interior of the casing always under observation of a person looking throu h the window 44 into the interior of the casing, and, also owing to its inclined position, into the interior of the receptacle or tub.

I also prefer to provide the casing 40 with a ventilating pipe 16, which may connect with a suitable exhaust fan. When this tub 46 is employed I prefer to arrange a sand shield l7 within the casing to intercept any sand that might be drawn towards the said ventilating opening.

lVhile the shaft 7 may be secured to the pedestal 6 by any suitable means I prefer to clamp this shaft in position by means of loo suitable U-bolts 418 that )ass throu h ooenings in said pedestal, and are locked thereto by suitable clamping nuts.

I may also provide the shaft 7 with suitable ball bearings 49, to reduce the friction between the hub 6 and the shaft 7 (Figures l and 7).

I may also provide a suitable felt disc packing 50 to form a close joint where the hub (3 pa es through the bottom 10" of the casing 410.

For the purpose of permitting the sand that collects in the lower part of the casing 40 to escape therefrrnn, and pass through the screen 39 into the sand box 38, I preferably provide at the lowest part of the easing 40 a sand spout 51 having a suitable valve or damper 52 by which the passage of the sand from said screen 39 may be controlled.

y In Figures and 6 til The casing; 40 is supported in stationary position preferably by any suitalde supports. 1 have here indicated upright supports 53 connected to the base 19 and also to said casing. Said supports may be of any suit able form and construction that Will hold said casin in a st said base, permitt ole or tub to be rm For holding the )e cleaned away from the floor and Walls of the receptools or tub I may provide suitable lugs on the inner Wall ol the tub suitable lugs on the bottoi'n thereof.

In Figures 1 and 4; of the drawings l have shown the door 2 mounted upon vertical hinges 4iand arranged to discharge the articles from the tub or receptacle onto the plate or chute 5, from which they pass out of the casing when the door open. have shown the door hinged at the bottom, mid capable of bcing; turned down into the inclined position shown in dotted lines in l iogure 5, Where the end of the door may ti l on the casing. In this construction the door itself forms a chute :tor the passage of the articles from the interior ct receptacle to the outside cit the casin In Figures 6, 7 and 9 l have sho the tub or receptacle 1 hinged at :58 to a pro jection 62 on the top of the hub 6, and. held in position thereon by means of elatch 59, and a curved centering lug 61.

The bottom of the tub or receptacle is provided With suitable openings 66 through which the sand escapes into the bottom of the casing.

I prefer to provide a suitable valve 63 for controlling the admission ot air under pressure to the nozzle for producing the sand blast.

I have indicated by the curved line 65, on Figure (l oi: the drawings the are through which the sand spray oscillates While the machine is in use. This may, however, be lengthened or shortened by adjustment of the connection between the oscillating lever 21 and the arm 29 through the linlr 2s and the pins 27.

ionary position above the cleaning receptafl Within said casing.

articles to l Operation.

In operating the device the articles to be cleaned are placed inside of the tub or receptacle 1 and the door of the outer casing is closed. The receptacle is caused to rotate by means of the beveled gear 8 and pinion '10 and one of the belt pulleys 12 or 1%, power being applied through the friction clutch 14 by means of the lever 15. If the belt is in engagement With the large pulley 12 the receptacle is revolved at a slow speed, and at a higher speed it the belt is in engagement with the smaller pulley To start the sand blast jet air under pressure upon a ledge the tub or is admitted by means of the valve 63. Oscillation oi the sand blast jet is caused by engaging the slot 26 ot the linl: ill with the pin 2?, on the arm 28, the sand blast spray being): therehylcaused to sweep through an are indicated at 5 in Figure 4r. Thelpositron of arc may be regulated by vortie cally adj: he; the clamp 3 onthe hanger 32 and horizontally by adjustingthc hub 3. the shaft 29. The throw or length 0': re is regulated by connecting the li n one or the other of the pins 2'7. l o. cln of cleaning; Work the link may rennet-ted from. the pin 27,

permitting the sand jet to remain stationary while the tub is revolving, or per cutting the sand blest jet to be oscillated by hand by means or? the arm 9.8 and the shaft The hanger is preferably provided with a vfrom the spout ol recleaningr the good sand and deposition it in the sand box 39. The sand blast nozzle creates the sand blast jet and the vacuum that causes the sand to be elevated to the nozzle from the sand box 38 through the pipe and the sand sucker 37. The dust generated during the cleaning operation is exhausted from the inside of the casing d0 through the exhaust pipe 46 which is connected with a. suitable suction fan not shown), while fresh air is admitted through the sight screen .44 and other openings. The articles being cleaned may be observed or inspected from the outside of the casing through the sight screen t l the interior of the casing being illuminated by the electric light Alter the parts are suitably cleaned the friction clutch may be disengaged causing the receptacle to come to a rest and the door 41 of the casing may then be opened, giving access to the interior of the casing, and permitting the articles to be discharged therefrom.

The details of the construction may be varied in many particulars Without departing from my invention.

I claim as my invention:

1. A closed housing a hopper Within the housing gearing for rotating; the hopper, including a drive-shaft a rocloshatt travcrs ing the housing; above the hopper arranged transversely of the unis of rotation of the hopper and having a lever-arm outside the housing, connections between lever and drive-shaft for oscillating the rock-shaft, a nozzle-carrier slidably adjustable upon the rock-shaft, and a nozzle vertically adjustable upon the carrier.

2. A closed housing, an axially inclined sleeve hub extending outwardly through and beneath the housing and rotatably supported, the upper portion of the housing being mounted to swing upwardly, and a hopper hinged at the periph ry of the hub so that when the hinging point is at its lowest level the hopper may rest on the lower portion of the housing, when swung to discharge position, means for rotating the sleeve and means for circulating sand through the housing from above downwardly.

3. A closed axially inclined housing, an axially inclined sleeve hub extending through and beneath the housing and. rotatably sup ported, an upper portion of the housing being mounted to swing upwardly. and a hopper hinged at the periphery of the hub so that when the hinging point is at its lowest level the hopper may rest on the lower portion of the housing, when swung to discharge position, means for rotating the sleeve hub, and means for circulating sand through the housing from above downwardly.

l. A device of the class described comprising a casing having hinged together upper and lower sections the parting line of said sections being diagonal, the upper section adapted to swing upwardly, an inclined hub rotatable within the casing, an open top receptacle hinged at the periphery of the hub so that when the hinging point is at its lowest level, the receptacle may rest on the lower port-ion of the housing in a posido, to dischar e its contents,

5. A device of the class described comprising an axially inclined casing. an axially 1nc"ned receptacle rotatable in the casing,

discharge opening at the lowest portion of bottom, an air intake in its top portion, both on the same side, and an exhaust conduit on the opposite side, the arrangement being such that dust escaping from the top of the receptacle is prevented from reaching the lower discharge opening.

l open at the top, said casing having a 6.1K closed housing, a hopper within 

